1 | //memmgr.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2011 |
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5 | * |
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6 | * This file is part of libroar a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * libroar is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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22 | * Boston, MA 02110-1301, USA. |
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23 | * |
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24 | * NOTE for everyone want's to change something and send patches: |
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25 | * read README and HACKING! There a addition information on |
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26 | * the license of this document you need to read before you send |
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27 | * any patches. |
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28 | * |
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29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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30 | * or libpulse*: |
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31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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32 | * and are therefore GPL. Because of this it may be illigal to use |
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33 | * them with any software that uses libesd, libartsc or libpulse*. |
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34 | */ |
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35 | |
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36 | #include "libroar.h" |
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37 | |
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38 | #ifdef ROAR_USE_MEMMGR |
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39 | #define NULL_BUFFER_CONST "RoarAudio" |
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40 | static char _libroar_null_buffer[] = NULL_BUFFER_CONST; // A byte sequense >= 8 byte. |
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41 | |
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42 | static inline void _libroar_null_buffer_check(void) { |
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43 | if ( memcmp(_libroar_null_buffer, NULL_BUFFER_CONST, sizeof(_libroar_null_buffer)) != 0 ) |
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44 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION_GUARD, NULL); |
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45 | memcpy(_libroar_null_buffer, NULL_BUFFER_CONST, sizeof(_libroar_null_buffer)); |
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46 | } |
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47 | #endif |
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48 | |
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49 | #define _err(x) do { roar_err_set((x)); return NULL; } while (0) |
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50 | |
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51 | #ifdef ROAR_USE_MEMMGR |
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52 | ssize_t roar_mm_sizeof(void * buf) { |
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53 | if ( buf == NULL ) { |
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54 | roar_err_set(ROAR_ERROR_FAULT); |
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55 | return -1; |
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56 | } |
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57 | |
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58 | if ( buf == _libroar_null_buffer_check ) |
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59 | return 0; |
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60 | |
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61 | roar_err_set(ROAR_ERROR_NOTSUP); |
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62 | return -1; |
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63 | } |
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64 | |
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65 | void * roar_mm_calloc(size_t nmemb, size_t size) { |
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66 | void * ret; |
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67 | |
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68 | if ( nmemb == 0 || size == 0 ) { |
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69 | _libroar_null_buffer_check(); |
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70 | return _libroar_null_buffer; |
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71 | } |
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72 | |
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73 | #ifdef ROAR_HAVE_CALLOC |
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74 | roar_err_clear_all(); |
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75 | ret = calloc(nmemb, size); |
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76 | |
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77 | if ( ret == NULL ) |
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78 | roar_err_update(); |
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79 | |
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80 | return ret; |
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81 | #else |
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82 | ret = roar_mm_malloc(nmemb*size); |
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83 | if ( ret == NULL ) |
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84 | return NULL; |
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85 | |
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86 | memset(ret, 0, nmemb*size); |
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87 | |
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88 | return ret; |
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89 | #endif |
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90 | } |
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91 | |
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92 | void * roar_mm_malloc(size_t size) { |
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93 | void * ret; |
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94 | |
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95 | if ( size == 0 ) { |
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96 | _libroar_null_buffer_check(); |
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97 | return _libroar_null_buffer; |
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98 | } |
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99 | |
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100 | #ifdef ROAR_HAVE_MALLOC |
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101 | roar_err_clear_all(); |
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102 | ret = malloc(size); |
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103 | |
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104 | if ( ret == NULL ) |
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105 | roar_err_update(); |
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106 | |
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107 | return ret; |
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108 | #elif defined(ROAR_HAVE_CALLOC) |
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109 | return roar_mm_calloc(1, size); |
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110 | #elif defined(ROAR_HAVE_REALLOC) |
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111 | return roar_mm_realloc(NULL, size); |
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112 | #else |
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113 | _err(ROAR_ERROR_NOSYS); |
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114 | #endif |
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115 | } |
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116 | |
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117 | int roar_mm_free(void *ptr) { |
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118 | |
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119 | if ( ptr == _libroar_null_buffer ) { |
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120 | _libroar_null_buffer_check(); |
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121 | return 0; |
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122 | } |
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123 | |
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124 | #ifdef ROAR_HAVE_FREE |
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125 | free(ptr); |
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126 | return 0; |
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127 | #elif defined(ROAR_HAVE_REALLOC) |
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128 | if ( roar_mm_realloc(ptr, 0) != _libroar_null_buffer ) |
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129 | return -1; |
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130 | return 0; |
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131 | #else |
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132 | roar_err_set(ROAR_ERROR_NOSYS); |
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133 | return -1; |
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134 | #endif |
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135 | } |
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136 | |
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137 | void * roar_mm_realloc(void *ptr, size_t size) { |
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138 | void * ret; |
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139 | #ifndef ROAR_HAVE_REALLOC |
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140 | ssize_t len; |
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141 | #endif |
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142 | |
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143 | if ( ptr == NULL ) |
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144 | return roar_mm_malloc(size); |
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145 | |
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146 | if ( size == 0 ) { |
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147 | roar_mm_free(ptr); |
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148 | _libroar_null_buffer_check(); |
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149 | return _libroar_null_buffer; |
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150 | } |
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151 | |
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152 | #ifdef ROAR_HAVE_REALLOC |
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153 | roar_err_clear_all(); |
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154 | ret = realloc(ptr, size); |
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155 | |
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156 | if ( ret == NULL ) |
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157 | roar_err_update(); |
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158 | |
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159 | return ret; |
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160 | #else |
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161 | len = roar_mm_sizeof(ptr); |
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162 | if ( len == -1 ) |
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163 | return NULL; |
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164 | |
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165 | ret = roar_mm_malloc(size); |
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166 | if ( ret == NULL ) |
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167 | return NULL; |
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168 | |
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169 | memcpy(ret, ptr, len > (ssize_t)size ? size : len); |
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170 | |
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171 | return ret; |
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172 | #endif |
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173 | } |
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174 | #endif |
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175 | |
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176 | void * roar_mm_memdup(const void * s, size_t len) { |
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177 | void * ret; |
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178 | |
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179 | if ( s == NULL ) |
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180 | _err(ROAR_ERROR_FAULT); |
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181 | |
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182 | #ifdef ROAR_USE_MEMMGR |
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183 | if ( len == 0 ) { |
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184 | _libroar_null_buffer_check(); |
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185 | return _libroar_null_buffer; |
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186 | } |
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187 | #endif |
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188 | |
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189 | ret = roar_mm_malloc(len); |
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190 | |
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191 | if ( ret == NULL ) |
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192 | return NULL; |
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193 | |
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194 | memcpy(ret, s, len); |
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195 | |
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196 | return ret; |
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197 | } |
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198 | |
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199 | void roar_mm_free_retvoid(void *ptr) { |
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200 | roar_mm_free(ptr); |
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201 | } |
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202 | |
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203 | #if defined(ROAR_USE_MEMMGR) || !defined(ROAR_HAVE_STRDUP) |
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204 | char * roar_mm_strdup(const char *s) { |
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205 | void * ret; |
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206 | #ifndef ROAR_HAVE_STRDUP |
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207 | ssize_t len; |
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208 | #endif |
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209 | |
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210 | if ( s == NULL ) |
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211 | _err(ROAR_ERROR_FAULT); |
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212 | |
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213 | #ifdef ROAR_HAVE_STRDUP |
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214 | roar_err_clear_all(); |
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215 | ret = strdup(s); |
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216 | |
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217 | if ( ret == NULL ) |
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218 | roar_err_update(); |
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219 | #else |
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220 | len = roar_mm_strlen(s); |
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221 | if ( len == -1 ) |
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222 | return NULL; |
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223 | |
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224 | ret = roar_mm_memdup(s, len+1); |
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225 | #endif |
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226 | |
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227 | return ret; |
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228 | } |
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229 | #endif |
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230 | |
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231 | #if defined(ROAR_USE_MEMMGR) || !defined(ROAR_HAVE_STRNDUP) |
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232 | char *roar_mm_strndup(const char *s, size_t n) { |
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233 | void * ret; |
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234 | #ifndef ROAR_HAVE_STRNDUP |
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235 | ssize_t len; |
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236 | #endif |
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237 | |
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238 | if ( s == NULL ) |
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239 | _err(ROAR_ERROR_FAULT); |
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240 | |
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241 | #ifdef ROAR_USE_MEMMGR |
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242 | if ( n == 0 ) { |
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243 | _libroar_null_buffer_check(); |
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244 | return _libroar_null_buffer; |
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245 | } |
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246 | #endif |
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247 | |
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248 | #ifdef ROAR_HAVE_STRNDUP |
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249 | roar_err_clear_all(); |
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250 | ret = strndup(s, n); |
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251 | |
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252 | if ( ret == NULL ) |
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253 | roar_err_update(); |
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254 | #else |
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255 | len = roar_mm_strnlen(s, n); |
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256 | if ( len == -1 ) |
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257 | return NULL; |
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258 | |
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259 | ret = roar_mm_memdup(s, len+1); |
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260 | #endif |
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261 | |
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262 | return ret; |
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263 | } |
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264 | #endif |
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265 | |
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266 | #ifndef ROAR_HAVE_STRLEN |
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267 | ssize_t roar_mm_strlen(const char *s) { |
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268 | size_t ret = 0; |
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269 | |
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270 | if ( s == NULL ) { |
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271 | roar_err_set(ROAR_ERROR_FAULT); |
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272 | return -1; |
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273 | } |
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274 | |
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275 | for (; *s != 0; s++, ret++); |
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276 | |
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277 | return ret; |
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278 | } |
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279 | #endif |
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280 | |
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281 | ssize_t roar_mm_strnlen(const char *s, size_t maxlen) { |
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282 | size_t ret = 0; |
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283 | |
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284 | if ( s == NULL ) { |
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285 | roar_err_set(ROAR_ERROR_FAULT); |
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286 | return -1; |
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287 | } |
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288 | |
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289 | #ifdef ROAR_HAVE_STRNLEN |
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290 | ret = strnlen(s, maxlen); |
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291 | #else |
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292 | for (; ret < maxlen && *s != 0; s++, ret++); |
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293 | #endif |
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294 | |
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295 | if ( ret == maxlen ) { |
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296 | roar_err_set(ROAR_ERROR_MSGSIZE); |
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297 | return -1; |
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298 | } |
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299 | |
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300 | return ret; |
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301 | } |
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302 | |
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303 | //ll |
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